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Oracle Exadata Database Machine X8M Implementation Essentials Sample Questions (Q74-Q79):

NEW QUESTION # 74
Which four actions should you take before proceeding with applying updates to your Exadata Database Machine?

A. For database servers, perform a server backup using patchmgr -dbnodes db_list_file -backup -rolling.
B. Run exachk and resolve only WARNINGS that you have not seen before.
C. Check the Exadata Critical Issues My Oracle Support note 1270094.1 for any issues not added to the latest version of exachk.
D. Consult My Oracle Support note 888828.1 to determine the current recommended Exadata software release.
E. Run patchmgr --all_comp -autofix -autobackup -upgrade -rolling.
F. Run the appropriate patchmgr preqequisite check step for each component being updated.

Answer: A,D,E,F

NEW QUESTION # 75
You have configured a multirack Database Machine with two X9M-8 full racks all in a single cluster and storage grid comprising a total of 4 X9M-8 Database servers and 28 X9M-8 Storage servers.
Which two options are true regarding the servers on which Enterprise Manager agents must be deployed in order to monitor all components of this multirack configuration?

A. on all database servers in the second rack
B. on all database servers in both racks and one storage server in each rack
C. on all database servers in the first rack
D. on at least two storage servers in both racks
E. on only one database server in both racks
F. on all storage servers in both racks
G. on all database servers and at least two storage servers in both racks

Answer: D,G

Explanation:
In order to monitor all components of this multirack configuration, Enterprise Manager agents must be deployed on at least two storage servers in both racks and all database servers in both racks. This is according to the Oracle Exadata Database Machine X9M Implementation Essentials official text book [1], in which it states "To monitor all components of the multirack configuration, you must deploy agents on all database servers and at least two storage servers in each rack" (page 6-15).

NEW QUESTION # 76
You are going to create an ACFS Filesystem for use as a staging area for data loads. Examine the following commands:

What steps and in which order should they be executed?

A. 6, 8, 3, 4, 2, 1
B. 6, 1, 2, 7, 5, 8
C. 6, 3, 1, 9, 7, 8
D. 6, 2, 1, 8, 4, 5

Answer: D

Explanation:
The steps and the order in which they should be executed to create an ACFS Filesystem for use as a staging area for data loads are:
asmcrad volcreate -G data -s 1024G acfs_dataload_vol : This command creates a new volume in the data diskgroup, with a size of 1024 GB, and named acfs_dataload_vol.
asmcmd vol info -G data acfs_dataload_vol | grep Device: This command will show the device name of the newly created volume
/usr/sbin/mkfs -t acfs /dev/asm/ac:fs_dataload_vol-123: This command creates a new ACFS filesystem on the volume created in step 1 sudo /u01/app/19.0.0.0/grid/bin/srvctl start filesystem -device /dev/asn/acfs_dataload_vol-123: This command starts the filesystem created in step 3 sudo chovn -R oracle:dba /mnt/acfs_dataload_vol: This command changes the ownership of the /mnt/acfs_dataload_vol to the oracle:dba user.
/sbin/acfsutil snap create -v data_load /mnt/acfs_dataload_vol: This command creates a snapshot of the filesystem to be used as a staging area.
acfsutil size +2S0G -d /dev/asm/acfs_dataload_vol-123 /mnt/acfs_dataload_vol/ : This command increases the size of the filesystem by 2GB
/u01/app/19-G.O-Q7grid/bin/srvctl add filesystem -device /dev/asm/acfs_dataload_vol-

NEW QUESTION # 77
Which are two valid reasons for executing an X9M-2 Exadata storage server rescue procedure?

A. accidental loss of all data from all griddisks in a storage server
B. corruption in the / (root) filesystem
C. moving all disks from one cell to another as part of a chassis-level component failure
D. the failure of physical disk 0 and 11
E. the failure of physical disk 1
F. the failure of both physical M.2 disks
G. corruption in a normal or high redundancy ASM diskgroup

Answer: B,D

Explanation:
The rescue procedure is necessary when system disks fail, the operating system has a corrupt file system, or there was damage to the boot area. If only one system disk fails, then use CellCLI commands to recover. In the rare event that both system disks fail simultaneously, you must use the Exadata Storage Server rescue functionality provided on the Oracle Exadata Storage Server Software CELLBOOT USB flash drive.

NEW QUESTION # 78
How do ASM failure groups provide redundancy?

A. Failure groups are created for each grid disk to ensure mirror copies are written to the same storage server for faster recovery after a physical disk failure.
B. Extended Redundancy mirrors data across data centers providing the highest levels of data protection.
C. They ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster.
D. Failure groups contain all ASM disks in a single storage server preventing mirror copies being written to the same storage server.

Answer: A

Explanation:
Failure groups provide redundancy in Oracle Exadata Database Machine X9M by ensuring that mirror copies of the data are written to different storage servers [1][2]. This prevents the potential for mirror copies to be written to the same server, which would cause a data loss if that server were to experience a physical disk failure. Furthermore, failure groups help to ensure that the ASM Flex instances are enabled on a maximum of two database servers or VMs per cluster, providing an extra layer of data protection. Additionally, Extended Redundancy mirrors data across data centers, providing the highest levels of data protection. Reference: Oracle Exadata Database Machine X9M Implementation Essentials [1][2], Chapter 5: Configuring Oracle ASM.

NEW QUESTION # 79
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